Safety lamp guard



M. v. D] sAPlb SAFETY LAMP GUARD Aug. 11, 1942."

Filed Oct. 2, 1940 j? z' flzravzij r? 5 flu 2 5 0266i; 1 p 1 22, fiafigaammm Patented Aug. 11, 1942 SAFETY LAMP GUARD Michael Vincent Di Sapio,Brooklyn, N. Y., as-

signor to Alexander Joseph Heidt, Woodhaven,

Application October 2, 1940, Serial No. 359,415

1 Claim.

The present invention relates to portable lamp guards of the type madealmost entirely of insulating material, and particularly to an improvedconstruction by which a hook of the same material is secured to the cagewhich surrounds the lamp bulb.

In prior devices of this character, one form of which is shown in theWilson Patent No. 1,958,222, dated May 8, 1934, the guard is made up ofa plurality of cage forming elements of insulating material, one end ofeach of which is secured to a disk, to which the hook, also ofinsulating material, is attached. In the patent, the hook is held inposition by locking nuts engaging the threaded base of the hook andholding a shoulder on the hook against the disk, thereby, to a slightdegree, limiting the turning of the hook with respect to the cage.

Safety lamp guards of this character are subject to extremely rough use,and the hook, after a period of time, frequently becomes weakened at theshoulder near the base and breaks at this point. The principal object ofthe present invention is to provide for a reenforcement of the shank ofthe hook so that the above objection may be avoided.

After a period of use, the hook ona guard of this character frequentlybecomes so freely turnable with reference to the guard that the hook nolonger remains in the desired position. My invention overcomes thisdifficulty by a connection which frictionally holds the hook againstundue swiveling movement, so that said hook will not work loose after aperiod of use.

Other and further objects and advantages of the present invention willmore fully appear from the following description, taken in connectionwith the accompanying drawing, in which- Fig. 1 is a side elevation of asafety guard embodying the invention.

Fig. 2 is a fragmentary sectional view showing the connection of thehook to the rest of the guard.

Fig. 3 is a sectional View along the line 33 of Fig. 2.

Fig. 4 is a sectional view along the line 44 of Fig. 2.

Like reference characters refer to like parts in the different figures.

With reference to the drawing, the guard is intended to shield a lightbulb l ina socket, not shown, in the end of a handle 2. The guard isreleasably secured to the handle in any suitable manner, as by aresilient ring 3, this structurebeing fully described in the aboveWilson Patent No. 1,958,222.

The cage or guard is made up of a plurality of strips 4 of insulatingmaterial with one end of each strip held between a pair of disks 5 and6, to which a hook I is also secured. The strips 4 are preferablyriveted to the disks, as by rivets 8, and the strips are also attachedbetween their ends to a peripheral annular strip 9 which holds thestrips 4 away from the light bulb. The ends of the strips 4 remote fromthe disk 5 are held beneath the ring 3, as shown.

In accordance with the present invention, which, as above stated,involves a reenforcement of the shank of the hook, and also a new typeof connection between the disks 5 and 6 and the hook, the shank 10. ofthe hook has a threaded bore ll] therein to receive an elongated machinescrew or bolt II having a head I2. The machine screw passes through ametallic washer [3, through the disk 5 and upwardly through the base lbof the hook and into the shank 1a.. The machine screw thus forms a rigidmetallic reenforcement to prevent breakage of the hook at a pointadjacent to its connection to the disk 5.

The upper disk 5 has a centrally located opening [4 to receive the baselb of the hook. The latter, which is normally rectangular incrosssection, has its base lb formed by cutting away a part of the edgesof the hook to define a substantially cylindrical portion fitting withinthe opening I4. The formation of the base portion lb of the hook definesshoulders 1c on the hook. These shoulders are held securely against theupper face of the disk 5 by the clamping action of the machine screw l2and washer l3 as the screw is tightened within the shank of the hook. Alocking pin l5 may extend laterally through the shank of the hook andthe machine screw to lock the parts in position after assembly.

In assembling the device the upper disk 5 is positioned on the base lbof the hook and the machine screw l2 and washer l3 are then placed inposition and tightened to hold the disk securely against the shoulders10 to assure a frictional engagement between the hook and disk to holdsaid hook against undue swivelling movement with respect to the disk.The strips 4 and bottom disk 6 are then placed in position and securedtogether and to the disk 5 by the rivets 8, there being a centralopening H5 in the disk 6 to receive the head of the machine screw I2.This opening I6 is preferably so dimensioned that the edges thereof willengage the head of the screw [2 securely enough to materially increasethe frictional resistance which prevents undue swivelling of the hookwith respect to the rest of the guard.

I claim:

In a lamp guard, a non-metallic non-conducting hook having a shank, adisk to which the shank of the hook is secured, said hook having ashoulder engaging with the side surface of the disk, a metallic clampingscrew extending through said disk and into the hook to make rigid the 10connection therebetween and to reinforce the shank of the hook, a washerbetween the head of the screw and said disk, a pin extending laterallythrough the hook and screw for locking the latter in position, a seconddisk substantially concentric to said first disk and having an openingtherein engageable with the head of the screw, and cage elements havingthe ends thereof positioned between and secured to said disks.

MICHAEL VINCENT DI SAPIO.

